People
We only know what we're told, and that's little enough. And for all we know it isn't even true.
— Guildenstern

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker questions both the amount and the reliability of what they know. Information reaches them through what others say, and even that limited account may be false. The uncertainty lies in having to consider how little confidence those reports deserve.
Context reviewed